ARONIS supplies fine organic compound samples and building blocks for combinatorial organic synthesis. We provide compound libraries for HT screening and custom synthesis service. In-house stock collection contains about 23,500 screening compounds and 1086 building blocks. All compounds have undergone quality control by 1H-NMR to confirm their chemical structure. The purity is at least 90%. We produce these compounds in our laboratory located in Moscow in quantity of milligrams up to hundreds grams.